My ex-husband who, like my sister, had health issues lost his job.

In real estate, this means that I would like to operate using win-win partnerships, where investments can be used for my personal financial gain, but can also contribute to improving communities, enhancing community health and building community resilience and prosperity. 

It is entirely possible that your sellers will read your blog and determine that they are leaving money on the table, so to speak.That said, I would recommend setting up one (main) domain that is the public face of your business (www.example.com), and has the appeals and contact forms for your sellers.

This is available for the public to read if you do some Google searches.My non-expert intuition is that this would be okay provided it was disclosed and your ratios support things properly.

If you dont know if they are legal or not, I dont suppose you know if they are adding to my health care costs by utilizing a system meant to care for legal residents.Here in the USA theres this little thing called the "rule of law", which actually means something to most of us.

It's all public record.

He has been managing the property for 6 yrs (I confirmed this by looking at the public tax records).

Here is a link to how the IRS explains it. http://www.irs.gov/publications/p523/ar02.html

I actually wrote a book on estimating repairs on a house, but never put it out to the public.

You can't just say "House For Sale, call me".You can say the house is for sale with an assignment of interest of something short and similar, the general public won't really know what that is nor do they care, but others involved in RE may.